a 3d monitor (Without glasses!)
this has been in the works for a while so alot of you probably already know about it, but either way, its EPIC
the keyboard sits behind the monitor, and you can grab files with your hand and stuff, its pretty mindblowing technology really.
http://www.techhive.com/article/251202/microsofts_3d_transparent_interface_makes_us_feel_like_were_living_in_the_future.html